Sound Activated Trigger

Discussion in 'General Electronics Chat' started by somu1987, Jun 8, 2011.

  1. somu1987

    Thread Starter New Member

    Jun 8, 2011
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    Anyone able to help with a reasonably sensitive sound trigger?

    Basically I need a sound activated trigger that would send a pulse to the Flash input of my Camera.

    This will help me to take some pictures of fast moving objects. Like picture of balloon popping.

    It needs to be simple if possible.

    I've tried a simple circuit, but its not working. Here is the ckt diagram. The mic I used is a Electret Mic.

    [​IMG]

    Please help me out of this...:confused:

    Thanks,
    Somu.
     
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  2. radiohead

    Active Member

    May 28, 2009
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  3. somu1987

    Thread Starter New Member

    Jun 8, 2011
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    Thanks for your reply.

    In first article the circuit seems to be very complecative. I don't have much knowledge in this area, and its too hard to implement for me.

    The second one (http://www.electronickits.com/kit/co.../elec/k126.htm), I've already tried for a VOX ckt, but went down to a failure.

    I think there is some problem with my electret microphone.

    How can I verify if my microphone is responding properly or not?

    I've a multimeter for testing purpose.

    Thanks again.
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    If you want to trigger something as fast as a balloon popping, you will definitely need an oscilloscope. And even then I don´t think that any circuit, including the camera, can react fast enough to catch it.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
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  6. somu1987

    Thread Starter New Member

    Jun 8, 2011
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    Please see this video http://www.youtube.com/watch?v=R8_dAgaBBdI
     
  7. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Looks cool, but you see all the pictures he makes are way too late to see the pop.
    I think to get a decent photograph, you need to know WHEN the thing is going to break, and flash it on time or a little sooner.
     
  8. somu1987

    Thread Starter New Member

    Jun 8, 2011
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    Thanks kubeek,

    Can you please tell me what kind of elements used in the video, specially the two IC. Actually I'm not able to find it out.

    Thanks again,
    Somu.
     
  9. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    It is http://www.makershed.com/ProductDetails.asp?ProductCode=MKGR1 which is a programable microcontroller, and a photo-mos optocoupler. The exact type of the opto depends on your flash, the arduino can be replaced with something much cheaper and simpler if you don´t need the programming capabilities.
     
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